package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.dao.Permission;
import com.itheima.dao.Role;
import com.itheima.dao.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * 用户权限功能
 */
@Component
public class SpringSecurityUserService implements UserDetailsService {

    @Reference
    private IUserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userService.findByUsername(username);
        if (user == null){
            return null;
        }
        List<GrantedAuthority> list = new ArrayList<GrantedAuthority>();

        Set<Role> roles = user.getRoles();
        for (Role role : roles) {
            // 授予角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));

            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions) {
                // 授予权限
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }

        UserDetails userDetails = new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);

        return userDetails;
    }
}
